The aim of this study is to investigate how the Emotional Cleansing Arts Play program, which consists of Music Play and Food Art Play, influences children's expression of aggression and whether the program has an effect to decrease children's aggressive behaviors. The following is the summary of the main results of this study: First, both post and further tests revealed that children between the experimental group who participated in the Emotional Cleansing Arts Play program and the control group showed statistically meaningful results in perceptual aggressiveness and impulsive aggressiveness. Second, in the pre-tests the aggressiveness of children, whether they belonged to experimental group or control group, showed no statistically meaningful results from the standpoint of teacher's perception. Third, based on emotional maladjustment behaviors perceived by the teachers in the experimental group and control group, pre tests showed no statistically meaningful results. Fourth, the Emotional Cleansing Arts Play program which is the integration of Eurhythmics Music Technique and Food Art Therapy, has shown to be effective in decreasing children's aggressiveness and in reducing their emotional maladjustment behaviors.